Improved riveting-hammer



UNITED STATES PATENT y OFFICE.'

IMPRovED RlvETlNc-HAMMER.

1 Specification forming part of Letters Patent No. 102,871., dated May 10, 1870.

` To dll 'whom t'tmdy concern:

the county of Hartford and State of Connecticut, y have invented a new and useful Improvementin Riveting-Hammers, of which the follow-ing is a specification.

Our invention is designed to be used for riveting lock-work for clocks; and it consists in the employment of a presser-spring arranged in combination with a riveting punch orhammer, and projecting below the end of the same, as hereinafter described.

In the accompanying drawingsFigure lis a front elevation of our invent-ion, and Fig. 2 a side elevation of the same.

A designates an ordinany pair of springgrippingjaws,which, by any proper mechan ism, can be made to grip the wire a, which is to be riveted into the shaft b.

B designates a heading-punch, the face of which may be either plain, concave, or countersunk,pas desired. The punch B is secured in a proper 'head or hammer, O, which may be arranged to swing on pivots or slide in ways,

Aso that itlican be made to descend with sufijcient force to head the wire a.

c designates a presser-spring, which is securedf-flrn'ily to the hammer O` and moveswith it. Thespring c is slotted at d to admit the end of the punch B,'the lower part of the spring being in advance of the face of the punch.

The operation is as follows: Thewire a is gripped and held in the jaws A, with its end projecting from the same a little more than the diameter of the shaft b. .The shaft is placed with the hole, which has been previously drilled to receive the wire a, immediately over the end of the same, when the hammer is made to descend. The spring 0, being in advance of the punch B, strikes the shaft b,.and presses it down upon thewirev until it rests upon the jaws A, when the spring depressesor yields and allows the punch to advance through the slot d, andhead the wire in the usual manner. Without the employment of the spring c it is necessary to drive the shaft b onto the wire a With a handhammer or otherwise previous tothe fall of the punch B.

We claim as our invention- The combination of the jaws A, presser-` spring c, heading-punch B, and hammer C, all constructed and operating together substantially as described.

HENRY A. SEYMOUR. WILLFORD H. N ETTLETON Witnesses: J AMES SHEPARD, HARVY GRAY. 

